I just went up on the thread.
Why it failed (in my single opinion of course):
1) too short! A contest per year should be more than enough. Maybe one every 1.5 years. With that time frame and enough advertisement throughout the community, it would be easier to gather great prizes like a Sam board, a mac mini with MorphOS license or maybe an AROSone...
2) Restrict it, so, coding will be simpler and quicker.
3) get a group of people to help. Create rules for judging the games by a group of selected people. Voting, if allowed, should only be used as "another judge". Don't publish results before the final announcement.